20AWG Electric Wire Flexible Silicone Wires 20 Gauge Stranded Tinned Copper 20AWG Flexible Silicone Stranded Electric Wires. Conductor: Tinned Copper. High-Quality Tinned Copper Inner Core. Top-Grade Tinned Copper Wiring - Stronger resistance to oxidation and less likely to corrode, easy to solder. byJuly 3, 2026